Motorcycle



FIG. 1 is a front, left side perspective view of a motorcycle showing my new design;

FIG. 2 is a rear, right side perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a top view thereof.

The portions of the motorcycle shown in broken lines form no part of the claimed design. 

The ornamental design for a motorcycle, as shown. 